Burnout Paradise was fun when I played the demo. I played a little of Turok too. The Devil May Cry 4 demo is fun and I get that from Gamefly when its released. I also get Lost Odyssey this month.
My friend brought over Guitar Hero 3 and I have tried Rock Band as well. The drums of rock band are somewhat realistic compared to the guitar of both games. There is no open and no way to slide between chords, hit pinch harmonics, palm mute, or anything. Pressing buttons in tandem with picking (there is only one string lol) and the odd whammy bar on held notes (since you can't do vibrato on the buttons that are on the fretboard). Overall disappointing, though it can be a really fucking difficult game. My friends seem to think it is more fun than actual guitar, but most of them can't play guitar for shit anyways lol. It is too shallow for me.
I still play Rainbow Six: Vegas, Mass Effect and the odd session of Halo 3 or Call of Duty 4.